µ[micro]electronics info

A weblog focused on interesting circuits, ideas, schematics and other information about microelectronics and microcontrollers.




Because I have not tested all electronic circuits mentioned on this pages, I cannot attest to their accuracy; therefore, I do not provide a warranty of any kind and cannot be held responsible in any manner.

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An older "homebrew" computer based on Zilog Z80182 (upgraded Z180) for inspiration.

The P112 is a stand-alone 8-bit single board computer. Typically running CP/M or a similar operating system (CCP or DOS+), it provides a Z80182 CPU with up to 1MB of memory, serial, parallel and diskette IO, and realtime clock, in a 3.5-inch drive form factor.

# Z80182 CPU at 16MHz (12.228, 18.432 or 24.576MHz optional)
# 32kB flash ROM, in-board reprogrammable
# 64kB SRAM, upgradeable to 1MB
# Real-time clock/RAM, with on-board battery
# 5 serial IO ports (2 as PC-AT compatible connectors, 3 as TTL outputs)
# Parallel port
# Bus expansion/logic analyser socket
# ROM monitor, including debugger

P112 author (schematics are available here)
P112 support page on Sourceforge
P112 mirror
P112 other mirror

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